How To Bleed A Radiator

Are your radiators not functioning as they used to?

Are there cold spots that take a long time to heat up?

If you notice these signs, it’s time to bleed your radiators. Bleeding your radiators releases air trapped inside and helps your central heating to operate efficiently.

If you’ve never done this before, don’t worry, it’s pretty simple, and we’ll talk you through it.

The first step is to find the radiators that need bleeding. So, feel around for cold spots or any parts of the radiator that isn’t as hot as other parts, as this is a sure sign the radiator needs bleeding.

Secondly, turn off your central heating system as this minimizes the mess that bleeding radiators can cause. Otherwise, you’ll have to clean a lot of water on the floor afterwards.

Step three is to release the trapped air. You’ll need to use a radiator key and a rag, which you can purchase in any DIY shop or online. The key must fit into the valve at the top of the radiator, and the rag is to catch the drips. Once everything’s in place, turn the key anti-clockwise to release the trapped air.

Water will begin flowing towards the gap that you’ve opened. When this happens, close the valve quickly to prevent too much water from dripping onto the floor and causing a mess.

Once completed, you need to check the pressure gauge on your boiler. If the pressure is low, you will need to top it up.

It may also help if you refer to the instructions from the boiler manufacturer.